jdk/src/windows/classes/sun/awt/Win32GraphicsEnvironment.java

@@ -91,11 +91,16 @@
 
     protected native int getNumScreens();
     protected native int getDefaultScreen();
 
     public GraphicsDevice getDefaultScreenDevice() {
-        return getScreenDevices()[getDefaultScreen()];
+        GraphicsDevice[] screens = getScreenDevices();
+        if (screens.length == 0) {
+            return null;
+        }
+        int index = getDefaultScreen();
+        return screens[0 < index && index < screens.length ? index : 0];
     }
 
     /**
      * Returns the number of pixels per logical inch along the screen width.
      * In a system with multiple display monitors, this value is the same for